SOLUTION: The mean age of students at a high school is 16.5, with a standard deviation of 0.7. You use the Standard Normal Table to determine that the probability of selecting one student at

Question 1151685: The mean age of students at a high school is 16.5, with a standard deviation of 0.7. You use the Standard Normal Table to determine that the probability of selecting one student at random whose age is more than 17.5 years is about 8%.
WHAT IS THE ERROR IN THIS PROBLEM?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
One possible error is whether the ages are distributed normally, which they probably are not in a high school with multiple grades where there are specific distributions in each grade. Using the standard normal table assumes all the ages are normally distributed.
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